The World: Population - Age 40-44 (1981) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 1. | United States of America | 12,028,281 | 1981 | |
| 2. | Indonesia | 7,660,431 | 1981 | |
| 3. | Brazil | 5,806,892 | 1981 | |
| 4. | Pakistan | 4,002,392 | 1981 | |
| 5. | Bangladesh | 3,794,746 | 1981 | |
| 6. | Nigeria | 3,278,792 | 1981 | |
| 7. | Mexico | 2,907,634 | 1981 | |
| 8. | Philippines | 2,183,691 | 1981 | |
| 9. | Turkey | 2,062,908 | 1981 | |
| 10. | Argentina | 1,609,201 | 1981 | |
| 11. | Ethiopia | 1,605,450 | 1981 | |
| 12. | Myanmar | 1,528,559 | 1981 | |
| 13. | Democratic Republic of the Congo | 1,255,071 | 1981 | |
| 14. | Colombia | 1,123,014 | 1981 | |
| 15. | Peru | 797,368 | 1981 | |
| 16. | Tanzania | 762,439 | 1981 | |
| 17. | Nepal | 733,613 | 1981 | |
| 18. | Sri Lanka | 712,469 | 1981 | |
| 19. | Malaysia | 619,950 | 1981 | |
| 20. | Afghanistan | 588,591 | 1981 | |
| 21. | Kenya | 564,146 | 1981 | |
| 22. | Mozambique | 537,206 | 1981 | |
| 23. | Serbia | 526,523 | 1981 | |
| 24. | Uganda | 465,856 | 1981 | |
| 25. | Ghana | 458,694 | 1981 | |
| 26. | Cote d'Ivoire | 389,040 | 1981 | |
| 27. | Cameroon | 375,080 | 1981 | |
| 28. | Madagascar | 331,729 | 1981 | |
| 29. | Syria | 322,828 | 1981 | |
| 30. | Angola | 316,744 | 1981 | |
| 31. | Mali | 303,267 | 1981 | |
| 32. | Cambodia | 290,651 | 1981 | |
| 33. | Niger | 262,893 | 1981 | |
| 34. | Haiti | 262,714 | 1981 | |
| 35. | Malawi | 262,036 | 1981 | |
| 36. | Burkina Faso | 260,038 | 1981 | |
| 37. | Guatemala | 258,012 | 1981 | |
| 38. | Dominican Republic | 240,560 | 1981 | |
| 39. | Senegal | 222,959 | 1981 | |
| 40. | Zambia | 221,563 | 1981 | |
| 41. | Somalia | 219,593 | 1981 | |
| 42. | Guinea | 204,455 | 1981 | |
| 43. | Chad | 197,151 | 1981 | |
| 44. | Rwanda | 176,889 | 1981 | |
| 45. | Sierra Leone | 172,312 | 1981 | |
| 46. | Burundi | 162,808 | 1981 | |
| 47. | Benin | 137,683 | 1981 | |
| 48. | Honduras | 127,910 | 1981 | |
| 49. | Paraguay | 127,195 | 1981 | |
| 50. | Papua New Guinea | 124,171 | 1981 | |
| 51. | Libya | 122,468 | 1981 | |
| 52. | Lebanon | 120,666 | 1981 | |
| 53. | Eritrea | 119,623 | 1981 | |
| 54. | Central African Republic | 115,202 | 1981 | |
| 55. | Togo | 106,672 | 1981 | |
| 56. | Nicaragua | 105,235 | 1981 | |
| 57. | Jordan | 88,715 | 1981 | |
| 58. | Panama | 88,661 | 1981 | |
| 59. | Liberia | 87,213 | 1981 | |
| 60. | Republic of Congo | 69,467 | 1981 | |
| 61. | Kosovo | 68,636 | 1981 | |
| 62. | Mauritania | 66,859 | 1981 | |
| 63. | Lesotho | 56,461 | 1981 | |
| 64. | Trinidad and Tobago | 49,353 | 1981 | |
| 65. | Namibia | 44,335 | 1981 | |
| 66. | Guinea-Bissau | 34,188 | 1981 | |
| 67. | Botswana | 33,911 | 1981 | |
| 68. | Gabon | 33,577 | 1981 | |
| 69. | Guyana | 28,947 | 1981 | |
| 70. | Bhutan | 25,402 | 1981 | |
| 71. | Swaziland | 24,253 | 1981 | |
| 72. | Bahrain | 17,398 | 1981 | |
| 73. | Djibouti | 15,841 | 1981 | |
| 74. | Suriname | 15,459 | 1981 | |
| 75. | Comoros | 13,782 | 1981 | |
| 76. | Cape Verde | 10,888 | 1981 | |
| 77. | Barbados | 10,302 | 1981 | |
| 78. | The Bahamas | 9,745 | 1981 | |
| 79. | Solomon Islands | 9,529 | 1981 | |
| 80. | Brunei | 7,952 | 1981 | |
| 81. | Samoa | 6,035 | 1981 | |
| 82. | Western Sahara | 5,612 | 1981 | |
| 83. | Belize | 5,158 | 1981 | |
| 84. | Vanuatu | 4,863 | 1981 | |
| 85. | Saint Lucia | 4,012 | 1981 | |
| 86. | Sao Tome and Principe | 3,948 | 1981 | |
| 87. | Aruba | 3,885 | 1981 | |
| 88. | Grenada | 3,071 | 1981 | |
| 89. | Seychelles | 2,757 | 1981 | |
| 90. | Dominica | 2,512 | 1981 | |
| 91. | Saint Kitts and Nevis | 1,172 | 1981 | |
| 92. | Tuvalu | 339 | 1981 |
